CN116216591A - Pile high portal and engineering machine tool - Google Patents

Abstract

The invention discloses a stacking portal frame and engineering machinery. The stacking portal comprises an inner portal and an outer portal, wherein an outer upright of the outer portal is sleeved outside an inner upright of the inner portal, and the outer upright and the inner upright are made of seamless steel pipes. In the stacking portal provided by the invention, the seamless steel tube is adopted for manufacturing the inner portal and the outer portal, so that the portal structure can be simplified, the manufacturing cost can be reduced, the portal strength can be improved, the roller can be canceled, and the influence on the operation efficiency caused by roller damage can be avoided.

Description

Pile high portal and engineering machine tool

Technical Field

The invention relates to the technical field of engineering machinery, in particular to a stacking portal frame and an engineering machine provided with the stacking portal frame.

Background

The stacker is suitable for stacking operation in narrow channels and limited spaces, and is ideal equipment for loading and unloading trays in overhead warehouses and workshops. The lifting device mainly utilizes a motor to drive a hydraulic self-station to push a hydraulic cylinder so as to control an inner portal and an outer portal (or called a stacking portal) to stretch and lift, thereby lifting the goods by a lifting appliance.

Fork trucks are industrial transportation vehicles, and are various wheeled transportation vehicles that perform handling, stacking, and short-distance transportation operations on pallet goods. The lifting device mainly utilizes a motor to drive a hydraulic self-station to push a hydraulic cylinder so as to control an inner portal and an outer portal (or called a stacking portal) to stretch and lift, thereby carrying goods to lift through a fork.

At present, when the inner door frame and the outer door frame of the fork truck move relatively in the vertical direction to enable the door frame to vertically stretch and lift, the wheel axle structures at the two sides of the inner door frame roll on the rails at the two sides of the outer door frame, or the wheel axle structures at the two sides of the outer door frame roll on the rails at the two sides of the inner door frame. The left and right upright posts of the inner and outer door frames are respectively provided with a wheel axle structure rail, so that the section shape is complex, and therefore, the left and right upright posts of the inner and outer door frames are generally cast by profile steel or welded by steel plates.

It can be seen that the stacking portal in the prior art has the following disadvantages:

1) The portal rail is formed by welding and machining, the portal structure is complex, and the manufacturing cost is high;

2) When the roller in the axle structure is matched with the portal frame rail to work, the contact surface between the roller and the rail is small, the contact stress is large, the portal frame is easy to damage, and the operation efficiency is influenced.

Disclosure of Invention

In view of the above, the present invention aims to provide a stacking portal frame and an engineering machine provided with the stacking portal frame, which adopt seamless steel pipes to manufacture an inner portal frame and an outer portal frame, can simplify the portal frame structure, reduce the manufacturing cost, improve the portal frame strength, cancel the rollers, and avoid the influence of the roller damage on the operation efficiency.

In order to achieve the above purpose, the present invention provides the following technical solutions:

the utility model provides a pile high portal, includes interior portal and outer portal, the outer stand cover of outer portal is established outside the interior stand of interior portal, and, outer stand with interior stand is by seamless steel pipe preparation.

Optionally, in the stacking portal, the outer contours of the cross sections of the inner upright posts are all of a first circle;

the outer column comprises a first column section and a second column section from top to bottom along the axial direction, the inner profile of the cross section of the first column section is of a second circular shape, the inner profile of the cross section of the second column section is of an open circular arc shape, and the open circular arc shape is equal to the second circular radius and is larger than the first circular radius.

Optionally, in the stacking portal, the inner portal further includes an inner column connecting beam:

the inner upright post comprises a first inner upright post and a second inner upright post which are arranged in parallel, and one or more inner post connecting beams are arranged between the first inner upright post and the second inner upright post;

the joint of the inner column connecting beam and the first inner column is positioned in the opening of the second column section of the outer column sleeved outside the first inner column;

the junction of interior post tie-beam with the interior stand of second is located the cover and establishes in the second interior stand outside the opening of the second column section of outer stand.

Optionally, in the stacking portal, the outer portal includes a first outer column, a second outer column, and an outer column connection beam:

the first outer upright post is sleeved outside the first inner upright post;

the second outer upright post is sleeved outside the second inner upright post;

the top ends of the first outer upright post and the second outer upright post are connected with the outer column connecting beam.

Optionally, in the stacking portal, one end of the inner column connecting beam is connected with the first inner column through a first ear plate, and the first ear plate is located in an opening of the second column section of the outer column;

the other end of the inner column connecting beam is connected with the second inner column through a second lug plate, and the second lug plate is positioned in an opening of the second column section of the outer column.

Optionally, in the stacking portal, the stacking portal further includes:

the lifting appliance is connected with the outer upright post in a sliding manner;

and the lifting assembly is used for controlling the lifting appliance to lift relative to the outer upright post.

Optionally, in the stacking portal, the inner upright post includes a jacking cylinder structure, the jacking cylinder structure includes a cylinder and a rod body coaxially disposed, and the rod body may axially extend out of the top end of the cylinder along the cylinder and may retract into the cylinder.

Optionally, in the stacking portal, the lifting assembly includes:

the wheel axle structure is arranged on the outer column connecting beam;

one end of the flexible piece is connected with the inner portal frame, and the other end of the flexible piece bypasses the wheel axle structure and is connected with the lifting appliance.

Optionally, in the stacking portal, the lifting appliance comprises a lifting appliance body and a sliding claw fixedly connected with the lifting appliance body;

the sliding claw is sleeved on the outer side of the outer upright post and can slide back and forth along the axial direction of the outer upright post.

Optionally, in the stacking portal, an inner slider is disposed between the outer upright and the inner upright.

A working machine provided with a stacking mast as described above.

Optionally, in the engineering machinery, the engineering machinery further comprises a chassis and a swinging oil cylinder;

one end of the swing oil cylinder is hinged with the chassis, and the other end of the swing oil cylinder is hinged with the inner portal or the outer portal in the stacking portal.

Optionally, the engineering machine is a fork lift or a fork truck.

According to the technical scheme, the stacking portal frame and the engineering machinery provided with the stacking portal frame are manufactured by adopting the seamless steel tube, and compared with the casting portal frame and the splice welding portal frame in the prior art, the portal frame structure and the manufacturing process are simplified, so that the production cost is reduced. Moreover, because the seamless steel pipe is of an integrated structure and has no connecting structures such as splicing welding seams, the portal frame has higher mechanical strength, rigidity and other excellent performances, rollers can be omitted, and the influence on the operation efficiency caused by roller damage is avoided.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic diagram of an overall structure of an engineering machine provided with a stacking portal according to an embodiment of the present invention;

FIG. 2 is a side view of the work machine shown in FIG. 1;

fig. 3 is a schematic structural view of an inner door frame in a stacking door frame in a contracted state according to an embodiment of the present invention;

fig. 4 is a schematic structural view of an inner door frame in a stacking door frame in an extended state according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of an outer portal in a stacking portal according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a lifting appliance in a stacking portal according to an embodiment of the present invention.

Wherein:

1-inner portal, 2-outer portal, 3-lifting appliance, 4-wheel axle structure, 5-chassis, 6-swinging oil cylinder,

7-flexible parts, 8-fastening joints, 9-inner slide blocks,

101-inner columns, 102-inner column connecting beams,

103-first ear panel, 104-second ear panel, 105-third ear panel, 106-fourth ear panel,

111-first inner uprights, 112-second inner uprights,

114-the body of rod,

201-outer columns, 202-outer column connecting beams,

211-first outer column, 212-second outer column,

301-a hanger body, 302-a hanger mounting rack, 303-a sliding claw, 331-an arc-shaped sliding block,

401-an axle mounting frame,

901-first inner slide, 902-second inner slide.

Detailed Description

The invention discloses a stacking portal frame and engineering machinery provided with the stacking portal frame, which are made of seamless steel tubes, can simplify the portal frame structure, reduce the manufacturing cost, improve the portal frame strength, cancel rollers and avoid the influence of roller damage on the operation efficiency.

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Referring to fig. 1 to 6, the stacking portal provided by the embodiment of the invention comprises an inner portal 1 and an outer portal 2, wherein an outer upright 201 of the outer portal 2 is sleeved outside an inner upright 101 of the inner portal 1, and the outer upright 201 and the inner upright 101 are both made of seamless steel pipes.

Here, the seamless steel pipe is a steel pipe perforated from a round steel pipe and having no weld on the surface and no seam along the periphery of the cross section thereof, and is called a seamless steel pipe. The seamless steel pipe comprises common and high-quality carbon structural steels Q215-A to Q275-A, no. 10 to 50 steel, low alloy steels 09MnV, 16Mn and the like, alloy steels, stainless acid resistant steels and the like. Further, the seamless steel pipe may be classified into a hot rolled seamless steel pipe, a cold drawn seamless steel pipe, an extruded seamless steel pipe, a push pipe, and the like according to the production method. The cross section of the seamless steel pipe can be round, square, elliptic, triangular, hexagonal, melon seed, star-shaped, finned pipe, etc. or other shapes.

Therefore, the inner and outer portal frames are manufactured by adopting the seamless steel tube in the stacking portal frame, and compared with the cast portal frame and the splice welding portal frame in the prior art, the portal frame structure and the manufacturing process are simplified, so that the production cost is reduced. Moreover, because the seamless steel pipe is of an integrated structure and has no connecting structures such as splicing welding seams, the portal frame has higher mechanical strength, rigidity and other excellent performances, rollers can be omitted, and the influence on the operation efficiency caused by roller damage is avoided.

In the stacking portal, the cross section of the inner upright 101 is a first circular shape; the cross-sectional inner profile of the outer post 201 is a second circle having a radius greater than the radius of the first circle. Thereby ensuring that the outer upright column 201 can be smoothly sleeved outside the inner upright column, and enabling the stacking portal frame to freely stretch and lift.

Preferably, in the stacking portal, the outer profile of the cross section of the inner upright 101 is a first circle; the outer column 201 comprises a first column section and a second column section from top to bottom along the axial direction, the inner profile of the cross section of the first column section is a second circle, the inner profile of the cross section of the second column section is an open circular arc, and the radius of the open circular arc is equal to that of the second circle and is larger than that of the first circle. Thereby ensuring that the outer upright column 201 can be smoothly sleeved outside the inner upright column, and enabling the stacking portal frame to freely stretch and lift.

Further, the inner mast 1 further comprises an inner column connecting beam 102. Wherein:

the inner upright post 101 comprises a first inner upright post 111 and a second inner upright post 112 which are arranged in parallel, one or more inner post connecting beams 102 are arranged between the first inner upright post 111 and the second inner upright post 112, and the inner door frame 1 can be ensured to have higher structural strength through the inner post connecting beams 102;

the junction of the inner column connecting beam 102 and the first inner column 111 is located in the opening of the second column section of the outer column 201 (i.e., the first outer column 211 shown in fig. 5) that is sleeved outside the first inner column 111;

the junction of the inner column connecting beam 102 and the second inner column 112 is located within the opening of the second column section of the outer column 201 (i.e., the second outer column 212 shown in fig. 5) that is nested outside the second inner column 112.

Correspondingly, the outer mast 2 comprises a first outer column 211, a second outer column 212, an outer column connection beam 202. Wherein: the first outer column 211 and the second outer column 212 are arranged in parallel; the first outer upright post 211 is sleeved outside the first inner upright post 111; the second outer column 212 is sleeved outside the second inner column 112; the top ends of the first outer column 211 and the second outer column 212 are connected with the outer column connecting beam 202, so that the outer door frame 2 can be ensured to have higher structural strength through the outer column connecting beam 202.

In the embodiment, referring to fig. 1, 3 and 4, one end of the inner column connecting beam 102 may be connected to the first inner column 111 through the first ear plate 103, and the first ear plate 103 is located in the opening of the second column section of the first outer column 211; the other end of the inner column connection beam 102 is connected to the second inner column 112 by a second ear plate 104, the second ear plate 104 being located in an opening of the second column section of the second outer column 212. Therefore, the first ear plate 103 and the second ear plate 104 can avoid the outer upright post 201, so that the inner upright post and the outer upright post can fully shrink.

Wherein specific positions of the first ear plate 103 and the second ear plate 104 may be provided at the sides of the first inner column 111 and the second inner column 112, respectively, remote from the spreader 3, as shown in fig. 1. Alternatively, in other embodiments, the first ear panel 103 may be disposed inside the first inner post 111 (i.e., on a side proximate to the second inner post 112), and the second ear panel 104 may be disposed inside the second inner post 112 (i.e., on a side proximate to the first inner post 111); further, the first ear panel 103 may be disposed outside the first inner column 111 (i.e., on the side away from the second inner column 112), and the second ear panel 104 may be disposed outside the second inner column 112 (i.e., on the side away from the first inner column 111). Alternatively, the first ear panel 103 may be disposed at any other location of the first inner post 111 and the second ear panel 104 may be disposed at any other location of the second inner post 112, each having particular advantages.

Preferably, the plane of the first ear plate 103 is coplanar with the central plane of the first inner post 111 and also coplanar with the central plane of the first outer post 211; the plane of the second ear panel 104 is coplanar with the center plane of the second inner post 112 and also coplanar with the center plane of the second outer post 212. However, the present invention is not limited to this, and the first ear plate 103 and the second ear plate 104 may be slightly inclined with respect to the center plane of the upright post, so that the effect of reinforcing the door frame may be achieved, and at this time, it is only necessary to ensure that the first ear plate 103, the second ear plate 104, and the inner post connecting beam 102 can be avoided when the outer door frame is lifted.

Further, a bottom end connection beam (not shown) may be provided between the bottom ends of the first outer column 211 and the second outer column 212. The bottom connecting beam is similar to the outer column connecting beam 202 in fig. 1, and two ends are respectively fixedly connected with the first outer column 211 and the second outer column 212, and is mainly used for strengthening and shaping the outer door frame 2. Moreover, in order not to interfere with the inner door frame 1, the bottom end connecting beam is provided with avoidance notches for avoiding the respective ear plates on the inner door frame 1.

In specific implementation, the fork lift portal further comprises a lifting appliance 3 and a lifting assembly. Wherein: the lifting appliance 3 is in sliding connection with the outer upright post 201 and can axially reciprocate along the outer upright post; the lifting assembly is arranged on the portal frame and is used for controlling the lifting appliance 3 to lift relative to the outer upright 201. During operation, lifting of the lifting appliance 3 is controlled through the lifting assembly, and then goods stacking operation can be achieved.

Specifically, the inner column 101 is provided with a jacking cylinder structure. Referring to fig. 4, the jacking cylinder structure includes a cylinder and a rod 114 coaxially disposed, and the rod 114 extends out of the top of the cylinder along the axial direction of the cylinder and is retractable into the cylinder.

In specific implementation, a jacking oil cylinder can be used as the inner upright post 101 and sleeved in the outer upright post 201, and the outer end of a telescopic rod of the oil cylinder is connected with the outer door frame, so that the outer door frame 2 can be controlled to lift. Or in other specific embodiments, a lifting cylinder is coaxially and fixedly connected to the top of the inner upright, the inner upright and the lifting cylinder are both sleeved in the outer upright 201, the cylinder body of the cylinder is fixedly connected with the inner upright, and the outer end of the telescopic rod of the cylinder is connected with the outer portal, so that the lifting of the outer portal 2 can be controlled.

In a preferred embodiment, see fig. 1, 2 and 5, the lifting assembly comprises an axle construction 4 and a flexible member 7. Wherein: the axle construction 4 is mounted on the outer column connecting beam 202; one end of the flexible piece 7 is connected with the inner portal 1, and the other end is connected with the lifting appliance 3 after bypassing the wheel axle structure 4.

Specifically, referring to fig. 5, the outer column connecting beam 202 is provided with an axle mounting bracket 401 for mounting the axle structure 4.

Preferably, two sets of lifting assemblies are arranged in the stacking portal, namely two sets of axle mounting frames 401, two sets of axle structures 4 and two sets of flexible members 7 are arranged side by side, so as to ensure that the lifting appliance 3 can stably lift and not incline.

In particular, referring to fig. 1, one end of the flexible member 7 is connected to the inner column connecting beam 102 of the inner gantry 1 via the fastening joint 8, and the other end is locked to the spreader 3 after bypassing the axle structure 4. The inner column connecting beam 102 to which the flexible member 7 is connected is generally the inner column connecting beam 102 fixedly attached to the top end of the column body of the inner column 101 shown in fig. 3 and 4. Also, for convenience of connection of the flexible member 7, the inner column connecting beam 102 is preferably of a plate-like structure (the inner column connecting beam 102 in the remaining position may be of a round bar structure or a plate-like structure). Alternatively, in other embodiments, the inner column connecting beam 102 may be a connecting beam structure having other cross-sectional shapes.

Specifically, the inner column connecting beam 102 for mounting the flexure 7 is provided with a mounting hole. When the flexible piece 7 is installed, the locking connection between the flexible piece 7 and the inner column connecting beam 102 can be realized through a fastening joint 8 which can be fixedly connected with the installation hole on the inner column connecting beam 102 and also can be fixedly connected with the flexible piece 7; the flexible piece 7 can also pass through the mounting hole on the inner column connecting beam 102 and then be connected with the pin-shaped member, and the locking connection between the flexible piece 7 and the inner column connecting beam 102 can be realized through the locking connection of the fastening joint. The specific connection manner of the flexible member 7 can be implemented in various ways, and the skilled person can implement the implementation according to actual needs, which is not particularly limited in the present invention.

In practice, the flexible element 7 is preferably a chain, in which case the axle structure 4 is a sprocket wheel; alternatively, the flexible member 7 may be a wire rope, in which case the axle structure 4 may be a conventional pulley.

In addition, in other embodiments, other lifting mechanisms may be used as the lifting assembly to achieve lifting of the spreader. For example, the axle structure 4 is changed to a winch, and the lifting appliance 3 is controlled to lift along the outer door frame 2 by winding/unwinding the flexible member 7 through the winch.

In specific implementation, referring to fig. 1, 2 and 6, the lifting appliance 3 in the stacking portal comprises a lifting appliance body 301, and a sliding claw 303 is fixedly arranged on one side of the lifting appliance body 301. The sliding claw 303 is fitted over the outer side of the outer column 201 and is reciprocally slidable in the axial direction of the outer column 201.

Note that the opening of the sliding pawl 303 is aligned with the side opening of the second column section of the outer column 201. Therefore, when the outer column is lifted along the inner column and the sliding claw 303 is lifted along the outer column, the sliding claw 303 in the lifting appliance 3 can smoothly avoid the inner column connecting beam 102 of the inner portal 1 and the lug plates connected with the two ends of the inner column connecting beam.

Specifically, referring to fig. 1 and 6, two sets of sliding claws 303 are disposed on one side of the lifting tool 3 near the gantry, and the two sets of sliding claws 303 are respectively sleeved on the first outer column 211 and the second outer column 212. There may be only one sliding jaw 303 in each set of sliding jaws 303, or a plurality of sliding jaws 303 coaxially arranged.

In specific implementation, each sliding claw 303 has a circular arc tubular structure and can be made of steel pipes, and an arc sliding block 331 is fixedly arranged on the inner side of each sliding claw so as to ensure that the lifting appliance 3 can smoothly lift along the outer upright post.

Preferably, a plurality of sliding pawls 303 are each fixed to one spreader mount 302, and the spreader mount 302 is fixedly attached to the spreader body 301.

Specifically, an inner slide is provided between each outer column 201 and the inner column 101 inside thereof. Referring to fig. 3 and 4, the inner slide includes a first inner slide 901 fixed to the top end outer wall of the column of the inner column 101, and a second inner slide 902 fixed to the bottom end inner wall of the outer column 201. However, the present invention is not limited thereto, and in other embodiments, an inner slide may be provided at other positions between the outer column 201 and the inner column 101, so long as a sliding fit between the outer column 201 and the inner column 101 is achieved. Preferably, the inner slide is an annular slide.

In particular, the inner sliding block disposed between the outer column 201 and the inner column 101 may be made of stainless steel, low carbon steel, or other alloy materials or composite materials that can function as a sliding block.

In the specific embodiment, a proximity switch is further arranged in the stacking portal and is used for detecting the height of the lifting appliance 3/the outer portal 2. Alternatively, in other embodiments, other ways of detecting the height may be used instead of the proximity switch.

In addition, in other embodiments, an elastic member such as an air bag or a spring may be used instead of the above-described lift cylinder structure.

In summary, the embodiment of the invention also provides a construction machine, which is provided with the stacking portal frame.

Referring to fig. 1 and 2, the construction machine further includes a chassis 5 and a swing cylinder 6. One end of the swinging oil cylinder 6 is hinged with the chassis 5, and the other end is hinged with the inner door frame 1 or the outer door frame 2 in the stacking door frame. Therefore, the forward tilting and backward tilting of the portal can be controlled by controlling the expansion and contraction of the swinging oil cylinder 6.

Specifically, referring to fig. 2, 3 and 4, one end of the swing cylinder 6 is hinged to the door frame through a third ear plate 105, and the other end is hinged to the chassis 5 through a fourth ear plate 106. Wherein, the third ear plate 105 and the fourth ear plate 106 are provided with hinge holes. Moreover, the third ear plate 105 and the first ear plate 103 on the first inner upright 111 are located in the same plane, and are located in the opening of the second column section of the first outer upright 211, so as to avoid when the first outer upright 211 is lifted and lowered in a telescopic manner relative to the first inner upright 111; similarly, the third ear plate 105 and the second ear plate 104 on the second inner upright 112 are located in the same plane, and are both located in the opening of the second column section of the second outer upright 212, so as to avoid when the second outer upright 212 is lifted and lowered in a telescopic manner relative to the second inner upright 112.

Specifically, the working machine may be a fork lift or a fork lift.

Finally, it is further noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (12)

1. The utility model provides a pile high portal, its characterized in that includes interior portal (1) and outer portal (2), outer stand (201) of outer portal (2) are overlapped and are established outside interior stand (101) of interior portal (1), and, outer stand (201) with interior stand (101) are by seamless steel pipe preparation.

2. The stacking portal according to claim 1, characterized in that the cross-sectional outer contours of the inner uprights (101) are all a first circle;

the outer column (201) comprises a first column section and a second column section from top to bottom along the axial direction, the inner profile of the cross section of the first column section is of a second circle, the inner profile of the cross section of the second column section is of an open circular arc shape, and the open circular arc shape is equal to the radius of the second circle and is larger than the radius of the first circle.

3. The stacking portal according to claim 2, characterized in that the inner portal (1) further comprises an inner column connection beam (102):

the inner upright (101) comprises a first inner upright (111) and a second inner upright (112) which are arranged in parallel, and one or more inner column connecting beams (102) are arranged between the first inner upright (111) and the second inner upright (112);

the joint of the inner column connecting beam (102) and the first inner column (111) is positioned in the opening of the second column section of the outer column (201) sleeved outside the first inner column (111);

the connection part of the inner column connecting beam (102) and the second inner column (112) is positioned in the opening of the second column section of the outer column (201) sleeved outside the second inner column (112).

4. A stacking portal according to claim 3, characterized in that the outer portal (2) comprises a first outer column (211), a second outer column (212), an outer column connection beam (202):

the first outer upright post (211) is sleeved outside the first inner upright post (111);

the second outer upright post (212) is sleeved outside the second inner upright post (112);

the top ends of the first outer column (211) and the second outer column (212) are connected with the outer column connecting beam (202).

5. The stacking portal of claim 4, further comprising:

the lifting appliance (3) is connected with the outer upright post (201) in a sliding manner;

and the lifting assembly is used for controlling the lifting appliance (3) to lift relative to the outer upright post (201).

6. The overhead mast of claim 5, wherein the lift assembly comprises:

an axle structure (4) mounted to the outer column connection beam (202);

and one end of the flexible piece (7) is connected with the inner portal (1), and the other end of the flexible piece bypasses the wheel axle structure (4) and is connected with the lifting appliance (3).

7. The stacking portal according to claim 5, characterized in that the spreader (3) comprises a spreader body (301) and a sliding jaw (303) fixedly connected to the spreader body (301);

the sliding claw (303) is sleeved on the outer side of the outer upright post (201) and can slide back and forth along the axial direction of the outer upright post (201).

8. The stacking portal according to claim 1, characterized in that an inner slide is provided between the outer column (201) and the inner column (101).

9. The stacking portal according to any one of claims 1 to 8, wherein the inner column (101) comprises a jacking cylinder structure comprising a cylinder and a rod (114) coaxially arranged, the rod (114) being axially extendable along the cylinder beyond the top end of the cylinder and retractable into the cylinder.

10. A construction machine, characterized in that a stacking portal according to any one of claims 1 to 9 is provided.

11. The working machine according to claim 10, further comprising a chassis (5) and a swing cylinder (6);

one end of the swing oil cylinder (6) is hinged with the chassis (5), and the other end of the swing oil cylinder is hinged with the inner portal (1) or the outer portal (2) in the stacking portal.

12. The working machine according to claim 10 or 11, wherein the working machine is a fork lift or fork lift.

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